Skip to Main content Skip to Navigation

Réduction sélective de composés organiques en conditions subcritiques

Abstract : Aromatic amines are widely regarded as promising reaction intermediates for the production of dyes, antioxidants, pharmaceuticals and agricultural chemicals. The most widely used method for the preparation of aromatic amines is catalytic hydrogenation in general. The catalytic hydrogenation processes of nitroaromatic compounds use transition metals, such as (Pt, Ni, Pd, ..), organic solvents and hydrogen source like H2. However, the use of metal catalysts has certain disadvantages such as the high cost, recycling of the system, as well as certain environmental concerns. Organic solvents were also used during these processes, which required high energy consumption for the recovery of aromatic amines. Finally, the use of H2 can also lead to safety risks. In the present work, “green” and safe processes for the reduction of nitroaromatic compounds into aromatic amines in the presence of carbonaceous materials or lignocellulosic biomass under subcritical conditions have been developed. Initially, our interest in this work focused on the direct use of carbon which has the advantages, its low cost and its availability, this gave rise to a new process that is "greener" and safer. The reaction mechanism of the latter was studied using CIRCE software which is thermodynamic software based on the Monte Carlo method. This process was then applied to various aromatic nitro compounds substituted by an organic function in particular for the preparation of 3-aminobenzoic starting from 3-nitrobenzaldehyde. Subsequently carbonaceous materials were replaced by lignocellulosic biomass which is sawdust impregnated with a base in water in the subcritical state. Indeed, water known as a green solvent could involve new "green" processes in critical conditions and generate H2 makes it possible to supply the dihydrogen necessary for the feasibility of the reaction.
Complete list of metadatas

Cited literature [128 references]  Display  Hide  Download
Contributor : Abes Star :  Contact
Submitted on : Thursday, June 25, 2020 - 7:02:10 PM
Last modification on : Friday, June 26, 2020 - 4:22:08 PM
Long-term archiving on: : Wednesday, September 23, 2020 - 5:35:15 PM


Version validated by the jury (STAR)


  • HAL Id : tel-02881557, version 1



Sarra Tadrent. Réduction sélective de composés organiques en conditions subcritiques. Génie chimique. Université de Technologie de Compiègne, 2018. Français. ⟨NNT : 2018COMP2441⟩. ⟨tel-02881557⟩



Record views


Files downloads